Rock drill



W. T. WOODS june 24, 193%,

ROCK DRILL Filed Nov. 9, 1927 gwumato'o atto'cwm d zma/z/az/flw M a m/f5 Patented June 24, 1930 UNITED STATES PATENT OFFICE WALTER T. WOODS, OF LONG BEACH, CALIFORNIA, ASSIGNOR, IBY MESNE ASSIGN- MENTS, TO BYRON JACKSON 00., OF SAN FRANCISCO, CALIFORNIA, A CORPORA- TION, OF DELAWARE ROCK DRILL Application filed November 9, 1927. Serial No, 282,046.

This invention relates to rock drills of the type that are employed in drilling through hard rock formations by the hydraulic rotary method of drilling wells, such as oil 6 wells.

The present invention relates to aform of rock drill which is intended to operate in deepening a hole by presenting a roughened surface to the bottom of the hole which rolls upon the bottom of the hole grinding and disintegrating the material therefrom. Drills of this class generally employ a plurality of cone cutting elements and said cone cutting elements are generally carried by separate carriers. An object of the present invention is t provide an improved form of drill of this class in which the means for attaching the cone carriers or supports is of an improved form exceptionally durable in operation,

Another object of the present invention is to provide a means for attaching the cone carriers to the body of the drill, which attaching means is readily operated both to attach the carriers to the drill and remove the same from the drill as required.

Another object of the present invention is to provide a rock drill of this type with an improved form of 'reamer and means for attaching the reamer to the body of the drill.

Various further objects and advantages of the present invention will be understood from the description of a preferred form or example of a rock drill embodying the invention. For this purpose, there is herein-- after described with reference to the accompanying drawings the preferred form of rock drill.

Referring to the drawings Figure 1 is an elevationmainly in vertical section of the rock drill;

Figure 2 is a transverse section on the line 2-2 of Figure 1;

Figure 3 is a transverse section on the line 33 of Figure 1; and

Figure 4 is a transverse section on the line 4-4 of Figure 1.

Referring to the drawings,1 indicates the body of the drill which is provided at its upper end with a tapered and threaded pin 2 which provides a means by which the drill may be attached to a stand of drill p1pe and rotated in a well hole. The lower end of the drill body 1 is shown as termi nating in a threaded tapered socket 3 which provides a means for attaching to the body the cutting parts and carriers. The body 1 is also indicated as provided with a central passage 4, by means of which flushing fluid play he passed through the drill to the cuters.

5 indicates the cutters of the drill, the drill being shown as preferably provided with three cutters and .the cutters are indicated as of the conventional cone shape and provided with teeth 6 or other roughenings, by means of which the cutters may disintegrate the material at the bottom of the well hole when the drill is rotated so as to roll the cutters thereover. The cutters 5 are indicated as mounted upon axes which are substantially at a 45 angle to the horizontal and the axes of the three cutters are indicated as converging at the axis of the drill body 1. The cutting cones 5 are indicated as mounted by bushings 7 upon-pins 8. The pins 8 are indicated as having one endset into a cutter carrier 9 and having the other end extending from the cutter carrier and threaded as indicated at 10. The threaded ends of the pins 8 are preferably screw threaded to the bushing 7 and between the bushin 7 and the cutter carriers there are provi ed washers or wear plates 11. There is also provided a means for retaining the cutters upon the bushings, and said means is indicated as preferably comprising a metal ring 12 set in grooves in the cutters 5 and bushings 7 I .The pins 8 may be integral with the cutter carriers 9 although in the preferred form of the invention the pins 8 are first made separate from the cutter carriers 9 and The upper ends of the cutter carriers 9 terminate in pinfiortions 16 which together form an u w y .taperin threaded in ada ted to screw threade into the soc et 3 o the body 1. The socket 3 thus prov des a means for clam ing the cutter carriers rigidl together. ere is also preferably provi ed a means for clamp and holding the cutter carriers 9 to ther in addition to the socket 3, and for th s purpose the cutter carriers 9 are indicated as together forming a hollow bore 17 which is provided near its lower end with an annular rib 18 both edges of which are cut inwardly as indicated at 19 and 20. A clamping ring 22 w th a tapered socket 21 is indicated as positioned in e agement with the lower side 19-of the ann ar rib 18, and a second clamping rib 23 is indicated as having a tapered socket engaging the'side of the annular r b 18 at the top of the rib. A clam ing pin 24 is indicated as passing throug a bore 17 formed by the cutter carrier and threaded into the lower clamping ring 22. Sad clam in pin is furt er indicated as provide with an annular rib 25 engaging theupper clamping ring 23 whereby the clam ing pin 24 provides a means for forcing t e clamping rings 22 and 23 against the rib 18 binding the three cutter carriers together. The clamping pin 24 is indicated as provided with a hollow bore or passage 26 which serves as a means for carryin the flushing fluiddown to the cutters 5. he cutter carriers together form what may be termed a housing for the cutters 5, since the combined carriers 9 form a socket which houses the major portion of the cutters. The cutter carriers 9 might be described as formed by vertically dividing such housing.

The drill is also preferably provided with one or more reaming rollers 27. Said reamin rollers 27 are preferably disposed to revo ve about vertical axes and for this purpose are indicated as mounted upon shafts 28, the ends of which shafts are set in bearing: 30. Washers or wear members 31 are. in 'c ated as disposed between the rollers 27 and the bearings 30. The body 0 the drill 1 is provided with recesses 32 for enclosing the major part of the reaming cutters 27 leaving only a portion of their cutting edge extending beyondthe drill body. The drill body 1 is further provided with recesses 33 for receiving the bearings and said bearin 30 are indicated as being held to the drill dy 1 by suitable means such as Y the screws or pins 34.

The rock dr1ll herein described is of simple and sturdy construction, and in practice it is found that the cutting elements are firmly secured to the drill body 1 so that there is no danger of any of the parts of the drill bein lost in the well hole.

Wiile the particular form of rock drill herein described is well adapted to carry out the objects of the present invention, it is to beunderstood that-man modifications andchanges may be m e wit out departing from the invention, and the invention includes all such modifications and changes as come within the scope of the following appended claims.

I claim:

1. In means of the class described, a

urali of cutter carriers, cutters revolv- P W ably secured to said carriers, the carriers toge er formin a hollow bore,,and clamping mealilns in said re clamping the carriers toget er. r

2. A rock drill includm' g a plurality of cutter carriers, cutters revolvab mounted by said ca 'ers, said carriers orming an internal annular rib, and clampin means engaging. said rib and operating to old the carriers to ether.

3. A r drill of the class described, comprising a cutter housing vertically divided to form a lurality of cutter carriers, cutters revolvably mouted by said carriers, said carriers being provided on their inner sides with adjacent portions, an axial clamping means engaging said rib portions for holding the cutter carriers together to form said cutter housing said cutter housing rovidin a tapered threaded in, and a drill body aving a socket threa ed to said pin.

4. A rock drill of the class described, comprising a body having a socket, a cutter housing havin a hollow tapered pin threaded to said soc et, said cutter housing being vertically divided into cutter carriers, cutters revolvably mounted by said cutter carriers, said carriers being provided with inner rib portions, and axial clampin means engaging said rib portions for hol ing the cutter carriers together.

5. A rock drill of the class described, comprisingla hollow cutter housing having an mw y beveled, internal annular rib, the cutter housing being vertically divided into a plurality of cutter carriers, cutters revolvab y mounted by said carriers, beveled clampin rings engaging said annular rib, and a c amping member for ressing said clamping rings against said 6. A rock drill of the class described, comprising a plurality of cutter carriers, cutters revolvably mounted by said cutter carriers, said carriers being provided with adj acent rib portions, beve clamping rings at adjacent sides of said rib portions, and a hollow clamping pin engaging said clampmg rings.

A rock drill of the class described, comprising a cutter housing vertically divided into a plurality of cutter carriers, the housing forming a pin, cutting rollers revolvably mounted by said cutter carriers, a drill body having a socket threaded to said housing in, and additional clamping means cute within the axial center of said cutter carriers for ho1ding the cutter carriers of said housing together when said housing is detached from said. bod

Signed at Los A512? es, -Calif., this 2d day of November, 1

WALTERT. WOODS. 

